- Moves nutrients into your cells and takes waste out
- Counters the effects of sodium, which can help your blood pressure
Balance is key. If levels of potassium are either too low or too high, things can get off-kilter.
How much do you need? Adults should get at least 4,700 milligrams of potassium every day. Most people, though, fall short. And while taking in too much potassium isn’t a problem for healthy people, it can be if you have chronic kidney disease or take certain types of medicines. That’s one reason why you should check with a doctor before you take potassium supplements.
Here are some of the parts of your body potassium helps.
Your Heart and Other Muscles
Because it's a muscle, your heart needs potassium. It helps cells send the right electrical signals so that the heart pumps correctly. Having too much potassium in the body can alter the heart’s rhythm.
Potassium and Your Kidneys
Normally, the kidneys are your body’s exit ramp for most of the potassium that you take in each day, sending it out in urine. But in people with chronic kidney disease, potassium may build up and levels can become dangerously high.
Potassium and Your Nerves and Brain
Potassium helps your nerves fire properly so that they respond to stimulation. Again, this happens via electrical signals that travel from cell to cell.
As part of the nervous system, your brain also needs potassium. The mineral allows brain cells to communicate, both with each other and with cells that are farther away. Changes in potassium levels have been linked to learning, the release of hormones, and metabolism.